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https://issues.apache.org/jira/browse/HADOOP-17386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17317990#comment-17317990
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Steve Loughran commented on HADOOP-17386:
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Needs HADOOP-17631 for env var fallbacks to work properly in restricted parsing
> fs.s3a.buffer.dir to be under Yarn container path on yarn applications
> ----------------------------------------------------------------------
>
> Key: HADOOP-17386
> URL: https://issues.apache.org/jira/browse/HADOOP-17386
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Priority: Major
>
> # fs.s3a.buffer.dir defaults to hadoop.tmp.dir which is /tmp or similar
> # we use this for storing file blocks during upload
> # staging committers use it for all files in a task, which can be a lot more
> # a lot of systems don't clean up /tmp until reboot -and if they stay up for
> a long time then they accrue files written through s3a staging committer from
> spark containers which fail
> Fix: use ${env.LOCAL_DIRS:-${hadoop.tmp.dir}}/s3a as the option so that if
> env.LOCAL_DIRS is set is used over hadoop.tmp.dir. YARN-deployed apps will
> use that for the buffer dir. When the app container is destroyed, so is the
> directory.
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